private void CalculateHyperlinkBound(TagData hyperlinkTagData, ref Vector4 buttonBound, ref bool buttonBoundInit, ref float lastCharMinY, float xOffset, float yOffset, int stringIndex)
{
if (IsTempVertexValid())
{
Vector4 charBound = GetCharBound();
if (buttonBoundInit)
{
//判断换行
if ((lastCharMinY != float.MaxValue) && (lastCharMinY > charBound.w))
{
buttonBound.x += xOffset;
buttonBound.y += yOffset;
buttonBound.z += xOffset;
buttonBound.w += yOffset;
hyperlinkTagData.AddBound(buttonBound);
lastCharMinY = charBound.y;
buttonBound = charBound;
}
else
{
lastCharMinY = charBound.y;
if (charBound.x < buttonBound.x)
{
buttonBound.x = charBound.x;
}
if (charBound.y < buttonBound.y)
{
buttonBound.y = charBound.y;
}
if (charBound.z > buttonBound.z)
{
buttonBound.z = charBound.z;
}
if (charBound.w > buttonBound.w)
{
buttonBound.w = charBound.w;
}
}
}
else
{
buttonBound = charBound;
lastCharMinY = charBound.y;
buttonBoundInit = true;
}
}
if ((hyperlinkTagData.GetEndIndex() - 1) == stringIndex)
{
if (buttonBoundInit)
{
buttonBound.x += xOffset;
buttonBound.y += yOffset;
buttonBound.z += xOffset;
buttonBound.w += yOffset;
hyperlinkTagData.AddBound(buttonBound);;
}
buttonBoundInit = false;
hyperlinkTagData = null;
}
}
protected override void OnPopulateMesh(VertexHelper toFill)
{
if (font == null)
{
return;
}
// We don't care if we the font Texture changes while we are doing our Update.
// The end result of cachedTextGenerator will be valid for this instance.
// Otherwise we can get issues like Case 619238.
m_DisableFontTextureRebuiltCallback = true;
Vector2 extents = rectTransform.rect.size;
var settings = GetGenerationSettings(extents);
cachedTextGenerator.PopulateWithErrors(text, settings, gameObject);
// Apply the offset to the vertices
IList <UIVertex> verts = cachedTextGenerator.verts;
float unitsPerPixel = 1 / pixelsPerUnit;
//Last 4 verts are always a new line... (\n)
int vertCount = verts.Count - 4;
Vector2 roundingOffset = new Vector2(verts[0].position.x, verts[0].position.y) * unitsPerPixel;
roundingOffset = PixelAdjustPoint(roundingOffset) - roundingOffset;
toFill.Clear();
if (_tagDict != null)
{
foreach (TagData tagData in _tagDict.Values)
{
tagData.SetValid(false);
}
}
TagData hyperlinkTagData = null;
Vector2 sizeDelta = rectTransform.sizeDelta;
Vector2 pivot = rectTransform.pivot;
float xOffset = sizeDelta.x * pivot.x;
float yOffset = sizeDelta.y * pivot.y;
Vector4 buttonBound = new Vector4(float.MaxValue, float.MaxValue, float.MinValue, float.MinValue);
bool buttonBoundInit = false;
float lastCharMinY = float.MaxValue;
bool haveRoundingOffset = roundingOffset != Vector2.zero;
for (int i = 0; i < vertCount; ++i)
{
int tempVertsIndex = i & 3;
m_TempVerts[tempVertsIndex] = verts[i];
m_TempVerts[tempVertsIndex].position *= unitsPerPixel;
if (haveRoundingOffset)
{
m_TempVerts[tempVertsIndex].position.x += roundingOffset.x;
m_TempVerts[tempVertsIndex].position.y += roundingOffset.y;
}
if (tempVertsIndex == 3)
{
int stringIndex = Mathf.FloorToInt(i / 4);
if (hyperlinkTagData != null)
{
CalculateHyperlinkBound(hyperlinkTagData, ref buttonBound, ref buttonBoundInit, ref lastCharMinY, xOffset, yOffset, stringIndex);
}
else if (_tagDict != null && _tagDict.ContainsKey(stringIndex))
{
TagData tagData = _tagDict[stringIndex];
tagData.SetValid(true);
if (tagData.UseQuad())
{
float minX = float.MaxValue;
float minY = float.MaxValue;
for (int j = 0; j < 4; j++)
{
m_TempVerts[j].uv0 = _zero;//清除占位符显示 也可以用<color=#00000000><quad></color>来隐藏
if (m_TempVerts[j].position.x < minX)
{
minX = m_TempVerts[j].position.x; //获取占位符左下角坐标
}
if (m_TempVerts[j].position.y < minY)
{
minY = m_TempVerts[j].position.y; //获取占位符左下角坐标
}
}
tagData.SetStartPosition(new Vector3(minX + xOffset, minY + yOffset, 0));
}
else if (tagData.Type == TagType.hyperlink)
{
tagData.ClearBound();
hyperlinkTagData = tagData;
if (IsTempVertexValid())
{
Vector4 charBound = GetCharBound();
buttonBound = charBound;
lastCharMinY = charBound.y;
buttonBoundInit = true;
}
}
}
toFill.AddUIVertexQuad(m_TempVerts);
}
}
m_DisableFontTextureRebuiltCallback = false;
_dirty = true;
}